Jar closure



Dec. 22, 1931. l Q CULVER 1,837,411)

JAR cLosURE Filed March 5, 1930 .i9 jg 15 3 .f MMI/idf, 000 x II- 4 i AS Je iz jj WITNESS;- IN VEN TOR l 1," l y" Patented Dec. 22, 1931 UNITED STATES LEWIS 0. CULV'ER, OF FORTY FORT, PENNSYLVANIA .TAR cLosURn Application filed March 3,

rlhis invention relates to ar closures and has for an object to provide a jar of substantially the usual and ordinary type with a domed cover and compression gasket with improved means for holding the cover or lid clamped rigidly upon the jar with the gasket interposed. Y

A further object of the invention is to provide an engaging member of new and improved type for engagement under the shoulder of the glass jar with improved means carried by the engaging member for exerting pressure under manual control upon the domed lid.

A further object of the invention is to provide an improved type of engaging member having new and improved features of rigidit Y.

Bri further object of the invention is to pro-V vide in such a combination, a new and improved type of pressure exerting means.

lWith these and other objects in view, the invention comprises certain novel parts, elements, units, constructions, mechanical L movement and functions as disclosed in the drawings, together with mechanical and functional equivalents, thereof, as will be hereinafter more fully described and claimed.

In the drawings Figure 1 is a view of the improved closure seen in side elevation, applied to a jar,

Figure 2 is a diametrical sectional View extending longitudinally through the engaging member,

Figure 3 is a top plan view of the clamping mechanism,

Figure 4t is a topl plan view of a fragment of the jar cap.

Like characters of reference indicate corresponding parts throughout the several views.

The jar closure which forms the subject matter of this application is adapted for eoaction with a jar of a usual and ordinary type indicated at 10, having an annular shoulder 11, adjacent the top, forming a seat upon which an elastic gasket 12 may be employed for perfecting the sealing.

A dome-shaped cap 13, has a peripherial portion seated upon the shoulder 11 and 1930. semina. 432,686.

upon the gasket 12. This dome-shaped cap 13, is provided at its center or higher part with van annular shoulder 111 forming a socket. Y l

The engaging `member comprises a substantially U shaped band preferably of metal or other relative rigid material indicated in its entirety at 15. The ends of the legs of the U are bent in angularly at 16 to engage under the shoulder 11, and rigidity is provided by turning down edges at 17 These turned down edges 17 as will be noted, are intermediate the extremities and the middle of the band, leaving the middle of the band more flexible and are so formed that their margins bear upon the inclined parts of the cap 13 adjacent to its perimeter. At its middle the band is provided with a threaded boss 18 through which a screw 19 is inserted carried rigidly by a knurled wheel or disc 20. This disc has an underlying frusto-conical lug 21 fitting into the socket formed by the collar 14. Y

In operation with, the'parts assembled as shown in the drawings, rotating the disc 2O in the direction indicated by the arrow at Figure 3, serves to screw the screw 19 further into the boss 18 and thereby lift the lug 21 out of the socket formed by the collar 14;.

This being accomplished, the entire device may be removed from the jar by simply sliding laterally. It is obvious that in closing the jar the exact reverse movements are necessary by first sliding the inturned ends 16 under the shoulder 11, until the lug 21 is over the socket formed by the collar 14 and rotating the disc 20 in the direction opposite the arrow, in Figure 3. The device is thus tightened upon the jar and the cap 13 is held securely in position.

The invention is hereby claimed as follows 1. A jar closure comprising a cap having a centrally located socket, a substantially U shaped band having inturned extremities adapted to engage with the sides of the jar,

`a screw inserted at the middle of the band positioned to enter and exert pressure within the socket, a disc carried by the screw adapted to receive manual stress for operating the screw and turned reinforcing edges intermediate the screw and the inturned extremities proportioned to bear upon the top of the cap.

2. A j ar closure comprising a cap having 5 a centrally located socket and inclined downwardly from said center to its perimeter, a substantially U shaped band having nturned extremities adapted to engage with the sides of the jar, a screw inserted at the middle of the band positioned to enter and' exert pressure Within; the,v socket,. a d'islc car-- ried by the screwsT adapted to receive manual stress for operating the screw, and turned reinforcing edges intermediate the screw and the inturned extremities proportioned' t0 bear upon, the inclined.l portion of the topof the cap-ad'jvacei-it its perimeter.

In testimony whereof L have signed my name to this specification.

2.@ LEWIS O'.y CULVER'. 

